Fuel-oil-burning apparatus.



E. W. TUCKER.

FUEL OIL BURNING APPARATUS. APPLICATION HLED 0CT.3.1912.

1 136,,849 Patented Apr. 20, 1915.

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WITNESSES I N VEN TOR.

A '1 TOR NE Y.

EDW'INW. TUCKER, or SAN FRANCISCO, CALIFORNIA.

FUEL-OIL-BURNING APPARATUS.

Specification of Letters Patent. Patgntedl Apr. 2Q 1915 Applicationfiled October 3, 1912. Serial N 0. 723,736.

7 .To all whom it may concern? Be it known that I, EDWIN W. TUCKER,

:a citizen of the United States, and a resident of the city and countyof San Francisco, State of California, have invented new and usefulImprovements in Fuel-Oil-Burmng Apparatus, of which the following is aspecification.

This invention relates to lmprovements in fuel oil burning apparatus andhas for its object the proper combination of the atomized fuel with theair admitted through the furnace front; and includes the combination ofthe atomizing burner and an adjustable ventilator front adapted tocontrol .the whole volume of air admitted to the furnace, of dividing aportion of the air from the main body of ventilation and diverting itinto combination with the atomized fuel and to give to the whole mass ofadmitted air a whirling or cyclone motion.

Other objects and advantages will appear as the description progresses.

I shall outline in full that form of the in vention selected forillustration in the drawings accompanying and forming part of the resentspecification. The novelty of the invention will be included in theclaims suo ceeding said description. From this it will appear that I donot restrict myself to the showing made by said description anddrawings, as I may adopt many variations within the scope of myinvention as expressed in said clalms.

I have discovered in connection with the burning of fuel oil, that givena whirling motion the air admitted through the furnace front will morecompletely fill the furnace, eliminating troublesome air-pockets,

or dead spaces, invariably present when the air is drawn in by stacksuction or forced draft through the conventional furnace front or damperdoor. This trouble is easily traceable to the disposition of a mass ofair in motion to eddy and tumble dueto friction set up in passing astatic mass, unequal expansion and contraction, etc. This is furthertaken advantage of by releasing the atomized fuel in the center orvortex of the column, insuring the proper oxidization of the atoms offuel and even combustion throughout the furnace, eliminating the suddenstoppage and reignition of the flame when an air pocket withholds thenecessary oxygen to support combustion. These shocks are so frequentthat a rapid vibra- \tlon is set up 1n the furnace very deleterious.gophe whole mechanism particularly under o1 ers.

In the drawings: Figure 1 is a vertical cross-section of a forced draftfurnace front and fuel oil burner constructed and combined in accordancewith the invention.

Fig. 2 is a similar view of the same as applied to a natural draftfurnace front. Fig. 3 is an end elevation. looking into the big end ofthe aspirator hood surrounding the burner.

In detail the construction consists of the fuel oil burner comprisingthe base fitting 1 provided with the fuel inlet 2 and the air inlet 3.The plug 4: is screwed into the neck 5, the flange 6 abutting the end ofthe neck to form an outer seal. The inner end of the plug compresses thegasket 7 against the edges of the center opening formed between thechambers 8 and 9 in the base I fitting, to forman inner seal.

the atomizing elements are not germane to this present invention, thatis, not limited to any particular form of atomizing burner. The squaredportion 14 provides a wrench hold for withdrawing the whole fuel conduit assembled in the plug 4. The fuel feed is controlled by the valve15.

The body 12 of the burner acts as a guide for the threaded tubular stem16 of the aspirator hood 17 that is threaded into the swivel sleeve.18.This sleeve is provided with the flange 19 hearing against the fr'ontplate 20, within which it is rotatably ,secured by the fixed flange 21secured to the sleeve and abutting the inside of the plate. This frontplate is fixed to the ventilator to form a front seal in the forceddraft type illustrated in Fig. 1, or is perforated and provided with alouver 22in the natural draft type shown in Fig. 2.

The aspirator hood 17 formed integral with or fixed to the stem 16 isconic'al in shape concentric with and spaced from the the. tubular stem16 of the hood. This stem is 'slidable'on the body 12 of the burner oritmay be "guided by other means provided within the ventilator. the hoodis provided with. the spiral. vanes that are adapted to impart awhirling motion tothe column of air drawn through the hood. The hood canbe combinedvwith the burner and used in any kind of a furnace front,with or without spiral vanes.

The ventilator front illustrated as applied to the fronts of internallyfired marine boilers consists of an outwardly flared substantiallyconical shell provided with a distributing chamber 26 with ports 27 anda sealed front for forced draft practice, as in Fig. 1, or with an openfront plate and louver controls for natural draft, as in Fig. 2.

The essence of the present invention is the passing of all air admittedto the furnace through the ventilator fronts in intimate combinationwith the burning fuel,

with the twofold object of insuring proper oxidation of the fuel, and tosave the furnace from the deleterious effect of vagrant currents of coldair. Gradually tapering from the inlet the ventilator front terminatesin a restricted outlet opening 28 slightly greater in diameter than thesmaller diameter of the aspirator hood. The interior of the front isprovided with the spiral vanes 29 terminating at the outlet to give theinrushing air a whirling motion parallel with the column whirlingthrough the hood.

The particular function of the hood is to concentrate a whirling columnof air around the flame issuing from the burner tip. The presence offresh air in immediate proximity to the initial ignition point insuresperfect combustion preventing gulping and sputtering of the flame To.control the quantity of air deflectedtothe burner, the

hood can be moved forward by rotating the threaded sleeve 18 until thebody of the hood chokes the approach to the outlet 28 defleeting anincreased quantity of air through the hood, without materially lesseningthe discharge area of the outlet 28. Inversely by backing off thethreaded sleeve 18 and the The interior of hood slidably mounted uponand hood, the line of least resistance, will pass directly through theoutlet 28. To prevent the rotation of the hood, the stem is providedwith the slit 24: engaging a pin fixed in the burner shell. alwayspresent, theatomized particles are are more uniformly suspended and abetter mechanical mixture formed, insuring better combustion and a moreeven radiation of heat throughout the furnace. Under waapparatus, thecombination with a tapered ventilator body 'provided with interiorspirally disposed vanes, of a threaded sleeve, means for r0- tatablysupporting said sleeve, a tubular stem engaging said threaded sleeve, anoil burner within said sleeve provided with a tubular shell forming aguide for said sleeve, and a tapered hood carried by said tubular stemand provided with internal spirally disposed vanes.

2. In a fuel oil burning apparatus, the combination of a taperedventilator body, a burner provided with a tubular shell, a bracketforsupporting one end of said burner, a tapered hood slidably mountedupon and guided by said shell, said hood serving to center said burner,and-means for, adjusting said hood on said shell with respect to saidventilator body. i

3. In a fuel oil burning apparatus, the combination with a taperedventilator body provided with internal spirally disposed vanes, a burnerprovided with a tubular shell, means for supporting said burner, atapered guided by said shell, said hood being also provided withinternal spirally disposed vanes, and means for. adjusting said hood onsaid shell with respect to the ventilator body. v

- v. .EDWIN W. TUCKER. Witnesses: a v I E1 TUcKER, W. S. TUCKER. .f

greater volume of air taking the The whirling motion being the whirlingmotion may

